Chehalis River - Blue Slough Entrance Rainfall ForecastUnited StatesWAGrays Harbor CountyChehalis River - Blue Slough EntranceToday 16 AprNo RainThu 17 AprNo RainFri 18 Apr15%Sat 19 Apr20%Sun 20 Apr55%Mon 21 Apr20%Tue 22 Apr5%Chehalis River - Blue Slough Entrance rainfall forecast issued today at 5:04 am. Next forecast at approx. 7:04 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Langley Hill RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads